● Total Machine – 12 month

Machine warranty 12 months refers to the machine from delivery to the customer within 12 months due to manufacturing defects caused by the quality of the machine itself, we will give you a free warranty.

● 42Crmo Pull Rod – 24 month

All the pull rod of Sunbun machine made by china best screw manufacturer (Zhejiang Huaye Plastics Machinery Co., Ltd. ) which is the leader also enjoy the most advantage processing equipment in china. .

42Crmo raw material is top quality in china . (Haitian40 Crmo) After Long time production the Sunbun pull rod will be more and more shinning

So we can assure 24 month long warren for our pull rod.

● QT500-7 Mold Board – 36 month

All Sunbun Machine Mold board used by Nodular Casting iron code: QT500-7  

Good toughness, more than 10 times than normal gray iron materials.

Good plasticity. Elongation ≥7%  Gray iron = 0

high strength. Tensile strength ób≥420MPa, yield strengthós≥300MPa,  3 times than gray iron .

Strong corrosion resistance. Just 1/10 of normal Gray iron .

We assure 36 month for all our mold board.

● Vulnerable parts warranty items- 6 month

a. The plastic head of torpedo, plastic ring of torpedo, plastic gasket of torpedo, nozzle, nozzle flange, heating ring, relays and seals warranty for 6 months;

b. Screw and barrel warranty period -6 month

c. Other parts not specified in the warranty period generally guarantee for 12 months.

● To the machines which are over the warranty period, we only charge reasonable fees for the replacement of spare parts.

● Not free warranty items:

a. Malfunction or damage caused by non-product working environment (eg overheating, low humidity, unstable or unstable power supply);

b. Failure or damage caused by incorrect or improper use, storage, maintenance and operation of the product not according to the instructions;

c. Due to accidental or human factor causes (including operational errors, scratches, handling, bump, improper plug, foreign objects fall, rodents, pests, etc.)

d. Without the company's after-sales service personnel agree, customer make unauthorized disassemble;

e. Corrosion and damage to the appearance of the machine due to improper storage of the machine;

f. Failure or damage due to force majeure  (eg earthquake, fire, lightning strike, etc.);

g. Exceeds the warranty period.

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